Free Shipping on all orders $35 and up.

We offer standard delivery in 3 business days or less.

Please see our shipping map below for estimated times.

Estimated standard delivery time to the U.S. and Puerto Rico

Delivery time estimates do not apply to large or heavy items that require special
shipping (including most TVs), items shipped directly from the manufacturer, or
out-of-stock items. Some items that ship from the manufacturer can only be delivered
to addresses within the 48 contiguous states.

Delivery time for standard shipping to any of the 50 U.S. states or Puerto Rico is 1-3 business days. Saturday, Sunday and national holidays are not considered business days for delivery purposes.

Will that piece of gear fit your car?
We've climbed into thousands of vehicles to find out.

By buying this product you'll earn up to 70 Rewards points.

When you sign up for a Crutchfield account, you’ll be enrolled in Crutchfield Rewards. You’ll earn one point for every dollar you spend on gear from us. You can turn your points into Rewards Cards that you can use toward future purchases. You can sign up for an account now, or after you complete your purchase (you’ll get credit for the points either way).

It's time for an upgrade

Upgrading the old factory speakers in your car will give you a huge bump in sound quality, and Kicker designed CS Series speakers to get your sound system rockin' without breaking the bank. You'll enjoy your music even more when you hear all the details that your muddy-sounding factory speakers couldn't begin to reproduce.

Built tough

Kicker's 40CS684 speaker set provides low-end from a tough 6"x8" polypropylene woofer, with a polyester foam surround that will stay strong for years to come. The 1/2" PEI balanced dome tweeter takes care of the vocal and instrumental details that'll really bring your music to life. These speakers sound great powered by a factory radio or an aftermarket car stereo, and they'll really rock when connected to an external amplifier.

Why replace your car's original speakers?

The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.

Mounting Applications: While Kicker describes this speaker as
a 6x8, it also fits many 5x7 applications. Please check the Crutchfield Vehicle
Selector to confirm fit.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to
find elsewhere. That's because we have our own in-house Product Research
team. They verify what’s in the box, check the owner's manual, and record
dimensions, features and specs. We stay on top of new products and technologies
to help people make informed choices.

* Agree to Terms
By checking this box you agree your review becomes the property of Crutchfield,
that you are over 18 years of age, that you own or have owned this product, and
that you are located within the United States or its territories. Please see our
Review Guidelines for more information. We reserve the right (but are not
obligated to) review all submissions and edit or remove any review in any manner
which we deem necessary. Your review should be posted within seven days.

Bright highs, OK Bass, No midrange

Upgrading front doors of 2002 Ford F350 XLT with stock head unit. As compared to the stock speakers (which I left in back), these have bright tweeters, and tight bass. Stock appears to have better bass than these, but it is muddy. Honestly, stock speakers I could not hear ANY symbols...plop these units in and holy cow...there they are again!!! These may perform better at the low end with an upgraded head unit and an amp, but with stock head unit, don't expect huge improvements in bass. Overall, these speakers are clearly geared toward bright highs, and tight bass, but are lacking the mid-range...which can be OK, especially if you tend to boost those two ranges anyhow.

Kickers

I found the whole process to be great, from ordering to install it was great and I called to make sure I had all the items. The connectors that where included fit perfectly along with the actual speakers. The kicker speakers I had ordered where perfect they sound amazing. It wasn't hard to install myself, because crutchfield sent me instruction on how to remove the door panels and they where easy to follow! Overall I had a great experience on buying my first speakers ever with this company.

Great speakers

01This is my first acquaintance with Kicker. I was told I would not be disappointed. I replaced the OEM ones on my 2012 Ford Fusion. I was shocked to see the ones that came with the car. Even though they worked decent, I was in the mood to spend money and get the most out of the XM and cd player. I have the bass and treble set at mid, and even then they just blow me out of the car. With the door speakers I can feel the air moving on my legs as I crank up Ms Turner and her Simply the Best. The bass and treble are outstanding and with this upgrade I am sure to knock my head on the steering wheel. I have no reason to default on the Kickers and will be very unhappy when I sell this car.

Good Balance

These speakers are very well balanced for 2 way speakers. The JVC head unit I am using to power them is more than adequate. The speaker wiring harness included was a perfect fit also. This is a very reasonably priced upgrade that sounds great. (At least to me) I'm sorry I waited this long to make this upgrade.

Nice upgrade

I asked a crutchfield representative for there advice on what would be a reasonably priced speaker upgrade for my 2003 Ford explorer. I took his advise and I'm very happy with the speakers. The base was an improvement but not nearly as much as the highs. I found the speakers for a deal in there scratch and dent area and was really surprised at the excellent condition they were in. Like new.

Kicker CS684s

I found these speakers to be a substantial upgrade to the factory in the doors of my 2002 Mustang. I am running these off an amp and with a sub and the performance is very good for the money in this setup. This is my second set of Kicker speakers and I am very pleased with the value of the brand.

Good Price, Good Speakers

Used these to replace the door speakers in my 2004 Ford Taurus. They sound better than stock with better bass and work great with the stock radio. I will be buying another set sometime soon to put in the back of the car. Well worth the money.

Great factory speaker replacement

I purchased these speakers to replace the "cracking" factory 6x8's that are in the rear doors my 08 Ford Fusion. I wasn't expecting anything dramatic since I was just replacing the rear door speakers with the audiophile system. I must say the difference is noticeable! Tighter bass and crisper highs! I will be orordering two more of these speakers for the front doors!

Marginal Upgrade

I bought these speakers to replace the factory speakers in my 2014 F150,stock speakers were lacking,poor clarity and no bass.I installed the kickers and the clarity was better,but still lacking,and zero improvement in bass.I am using the stock HU,don't want to give up Sync,I don't know that an amp would make them any better.If you are looking to upgrade,I would research more.

Pros:Direct replacement for factory speakers,easy to install with the supplied harness.

Cons:a marginal upgrade over the factory speakers,no bass improvement over factory speakers.clarity is so so.

Crutchfield response on Tuesday, October 28, 2014That's a common reaction when replacing car speakers. What you can expect to hear from a new speaker is better clarity and definition in the mids and highs. So your music will sound better and more lifelike, but you might not hear more bass.
The only way to get more bass is to add more power, and if you want to keep the factory radio, that means adding an amplifier. A small (40-50 watts), 4-channel amp can supply twice the power of an aftermarket stereo and three or four times the power of the typical factory radio. That'll improve all the sound, but you'll especially hear it in the fullness of the bass.

Cleaner sound than factory speakers!

Great speaker for the price. I am a big fan of Kicker from the 90's when their sub-woofers were the bomb! My Ford Excursion had the original Made in China factory speakers that were rattling and just sounded worn. I decided to give these Kicker speakers a try and YES... they sound much better all around. I am using 6 of these that fit right into the stock door panels and the mid panel between seat row two and three. Clean high's, good mid's, and noticeable lows. For the price, I think this is a great choice. I added the foam baffles as well!

Pros:Clean high's, good mid's, and noticeable lows!
Better than Factory speakers!
No noticeable distortion at all levels!
Sounds great with just 20 Watts per speaker!

Sounds Great!

After reading other reviews I decided to purchase these Kicker's for my '05 Expedition which still had the factory speakers. What a big difference! I definitally have highs now and it is crisp sound. I am going to add a subwoofer to balance out the highs but I am very satisified!

Excellent OEM replacements

Great speakers for the money. Definitely better than the OEM speakers that came in the car. I was actually a little surprised at the OEM speakers because when I removed them they were actually made by Pioneer and said "Made for Mazda by Pioneer". I really expected better from Pioneer...but you can't expect OEM to be top quality when they're mainly concerned about the bottom line $$$. The audio from these is crisp, clear, good midrange, not so much on the low end (but maybe that's just the setup...no AMP - just powered from a Kenwood Navigation head unit and the speaker baffles might have something to do with it.). Very pleased as there is absolutely no distortion when really cranking the volume when the convertible top is down at highway speeds. Loud and clear enough to hear with the top down and passing a semi on the highway.

Pros:Perfect fit. Super easy to install. Sound great. No distortion even at high levels with the convertible top down.

Good upgrade

These units went in my sons 2003 Ranger 4 door truck. With the supplied pigtail we had them in at under an hour. This was a definite upgrade over the stock speaker, immediately noticed were that the highs came through much better with mids being fine. Since we had already installed a self contained sub/amp unit I wasn't concerned about the bass of these speakers, one look at them tells you lows are not where they shine. Overall for the price and the performance my son was very satisfied. On the side, I have in my F350 Boston Acoustics replacements for OEM and four Boston Acoustics tweeters mounted for and aft with a Pro Box sub behind my rear seat, for the money I wouldn't complain to have my sons setup at all.

Kicker 6" x 8" 40CS684

I am very pleased with the performance of the kicker 40CS684 speakers. The quality for the price is very good, however the best thing was the (free) wire harnesses that made instalation an absolute 5 minute breeze in my 2002 Ranger XLT super cab. It was fantastic no soldering, no sad electrical tape connections, just plug and play. Definet repeat customer.

Excellent purchase

The speakers were close to, but not quite a drop in fit. A little die grinder work to expand the oval about 1/16 inch and the fit nicely. The wiring harness connectors made the connections a breeze. The speakers give a very nice sound even with an old factory radio ......well worth the effort to remove the rear seat to get access to the rear deck.

Requires Amp - No Bass Either

Decided to experiment and Installed these in my front door of a mazda. Installed Kenwood 6x9s in the back. Powered with a Kenwood headunit (no amp). Had to adjust the fader 4 notches toward the front before I could even hear the kickers over the kenwoods.

Left it like that for a month and eventually began to notice the tweeters distorting on the kickers at listening volume (kenwoods still doing fine). Called Crutchfield to replace and they said it was because the kickers were not getting enough juice and that they are really meant to be powered by and an amp - which explains why they are distorting at low volumes (because they are not getting enough power). Returning and swapping out for the MTX TDX52's.

Pros:Sturdy design.

Cons:RMS rating is lie. Requires minimum 60W RMS for decent power.
No bass response at all. Factory speakers had put out more mid/bass.

2011 Mustang gt

Very good replacement for rear speakers. The shaker 500 is a modest sound system at best. This speaker helped the mids and highs. Not much in the lows, but that is what a sub woofer in the trunk is for. Overall I'm very happy with this purchase.

What I expected

Paired these speakers with an Alpine deck (CDE143BT) installed in the front of my 01 Expedition, much better than factory. Bass and low tones sound good, get some distortion on high end sounds though, not sure what the issue is but haven't had a chance to trouble shoot it yet. Overall what I expected, was looking for an upgrade from stock and that's what I got.

Why did I wait so long??

I installed a new head unit from Crutchfield right away upon purchasing a new (used) 2002 Explorer Sport, but waited over 4 years to install speakers, I wasn't sure about taking door panels off. With the free master sheets I had my door apart in minutes, replaced both front door speakers in less than 45 minutes. The rears on mine were super easy too, and now I have great sound. Thanks Crutchfield!! Can't believe I listened to muddy factory speakers for 4 years. Used the wiring adapters, and door trim tool, from Crutchfield.

Nice Speakers

These speakers were suggested to me by a Crutchfield advisor to go with my Alpine CDE-235BT radio that was also suggested for my 2002 Toyota Tacoma P/U. Both were to replace stock items. It was noted but there was a lot of custom work on the plastic speaker holders to make these speakers install flat on the speaker holders. After cutting away the necessary plastic the speakers fit fine. It took me longer to install the speakers than it did the radio. The speakers sound good for both music and the blue tooth phone hook up with the radio. So far I am very happy with the sound. It is just a small basic truck but I like to listen to good sounding music and the stock system definitely was not that. These speakers make a huge difference.

Pros:Nice crisp sound

Cons:None for the speaker just the install. They did not just fit right into the door without modification to the stock speaker holder.

Good Replacements

These Kicker speakers are several steps up from your plain, horrible sounding factory speakers that Ford uses. The quality is great; as expected from Kicker. The sound is much better than the factories.

kicker 40cs684

Perfect fit/replacement for 2005 mustang door. These speakers are a big difference over the stock door speakers. Just running off a high power alpine deck. They added a lot of clarity to the high range. I already have a sub and had replaced the rear deck speakers. The low end was already taken care of. I was hopping for a little more in the mid range. I have an amp I have not put in yet. maybe that will wake them up. I noticed some reviews say they don't put out as much bass as expected. I agree, the 6X8's I put in the rear deck produce more bass and punch. However, that could be do to the enclosure of the rear deck v.s. the door. Can't remember what speakers I put in the rear deck. The cars not hear at the moment.

Pros:perfect fit. clean clear sound. You can get pretty loud without distortion as long as you adjust the bass down or filter out low frequencies

Cons:maybe weak in the mid range, not sure yet, adding an amp to see any difference. Bass is not as good as others.

clean crisp sound

IN car stereo speakers you do get what you pay for, and every once in a while you get a little more. These speakers hooked-up to a stock radio replaced 25 watt paper cone stock speakers. Asking non-component speakers to give bass, mid-range and be awesome tweeters too all in one unit is asking alot. At 69.00 a pair these speakers do a nice job at all three. I am thrilled at the improvement over the stock speakers. - Adjustments with the radio controls: cranking the bass muddies the mid-range, cranking the treble to compensate helps but its really just loud at that point. The plus is these speakers are rated at 225 watts. I can crank up the volume, bass, and treble to their max and these speakers do not distort, wow! My ears can't take much of that so I'll never know how long you could leave it cranked before they do crack - lets not find out ;0) - With a stock radio they perform nicely, with an amplifier I'm sure everything would be that much better. - at normal listening and a bit louder for your favorite songs these are really clean nice sounding speakers, reproducing cymbals and high-hat as cleanly as the vocals and guitar leads - adding just a touch of bass adds the lows you need to round out the sound (drums, bass) *but they will not produce (on their own) the bass kick most are looking for these days.

Pros:They do everything they claim
They handle being cranked up easily
Simple install with Crutchfield adapters
Sound is clean and crisp at normal listening and above levels
OMG, their only sixty-nine dollars a pair - sweet!

Cons:You just can't get them to perform like three hundred dollars a pair speakers - If thats what you want spend Three Hundred dollars

Excellent Replacement Speakers

I installed 4 of these 6x8 in my sons old pickup along with a new head unit and they sound fantasic! An amazing difference form the old factory paper cone nightmares that he had. He now has some bass and the highs and mids are MUCH improved over the factory speakers. Installation was simple and straightforward and the factory connectors provided by Crutchfield worked well.

Easy Install / Adequate sound

Mostly easy install.. I needed to use my rotozip to remove some plastic housing in the door panels to get the new speakers to lay flat.. ..and splice the pigtails provided to the factory harness.. . other than than it was plug and play. The sound quality is good.. however I would have liked to adapt larger speakers for the rear pair to get more low end response.. the result is adequate for now.

Pros:easy install, good price, fast shipping

Cons:low frequency response ( Bass ) is moderate... and when the bass output is increased by the head unit... the sound gets muddy... really needs a sub or larger woofs in the rear..

Good Overall

Installed these speakers in my F-250. Sound much better than the original speakers. Sound good at low to moderate volumes, at high volumes the bass is distorted, will have to put in a sub in the near future so I can decrease the bass to the speakers.

Great Speakers at an Affordable Price

I got two sets of these speakers to replace the mushy-sounding stock speakers in my 2002 Mustang. They were simple enough to install, and the improvement over the original speakers was immediately noticeable. They have nice, crisp, mids and high range. There's not a lot of bass, but that's to be expected, and they sound great when paired with a decent subwoofer.

Pros:Crisp mids and high range

Cons:Not much bass on their own, but sounds great when paired with a subwoofer.

Kicker 40CS684

Great speakers for the price. Installed them in the rear of my 05 Mustang, replacing some older Alpines. Paired them with a Sound Ordnance 4 channel amp and they sound excellent. Definitely a great purchase!

nice sound for the price

Purchased these as a gift for a friend on a ford excursion. Replaced the factory fronts with these kickers. Being that there still hooked up to the factory stereo. They KICK. Very nice sounding speakers for the price. and still has room for an aftermarket stereo or an amp.

good solid efficient speakers

Good sound from inexpensive speaker. Very efficient so Pioneer head unit is ample power to drive them. Bass is not as good or tight as I would have expected. I have had other 6x8's that had better response. Overall good match in rear doors of a Ford Focus sedan. A sub will be added to fill out bottom end.

Pros:efficient, good midrange and upper frequency response.

Cons:not as good bass response as some other speakers in this price range.

Great upgrade from stock speakers

Great improvement over stock speakers. I paired these up with some 6x8 alpines and a clarion 4 channel amp. way stronger in the mid range over the stockers and I would say more than the alpines too. I wish they had some more low-end to them, I figure my 6x9's in my other vehicle have more bass on a similar set up.

quick and easy upgrade

Written By nurbeh, north carolina on Thursday, August 29, 2013

These were installed within about 5 minutes and there is a big difference in the sound. The factory speakers were worthless after 7 years and over 100K miles. I would definately recommend these speakers.

AWESOME SPEAKERS !

I installed these speakers into my '04 Focus wagon and can't belive the difference in sound quality. This was the best investment I have made to my Focus, GREAT product, and very easy install, thanks Crutchfield.

Sounds quality is lacking

Written By timn1, Jacksonville fl on Monday, August 12, 2013

I bought these speakers based on several good reviews I've read. Sound quality is not very clear. The more I listen to them the more I hate them. They are slightly better than the factory speakers i had. But I wish I would have just spent a little more money and got a better quality speaker. Soon I will be ordering me a better set from Crutchfield. I've had three way or four way speakers in the past and I miss the clarity.

Kickin' speakers from Kicker

I put these in the rear of my 2002 Mustang GT to replace my stock speakers. (I put the component versions up front.) These things do an awesome job of filling the rear of the car with sound. Tight and crisp. They would easily be great in the front of my car, as well, if I had not wanted to do a component setup.